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参数资料
| 型号： | REF1112AIDBZR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.25 V, PDSO3 |
| 封装： | GREEN, PLASTIC, SOT-23, 3 PIN |
| 文件页数： | 7/11页 |
| 文件大小： | 376K |
| 代理商： | REF1112AIDBZR |
REF1112
5
SBOS283C
www.ti.com
APPLICATIONS INFORMATION
The REF1112 is a two-terminal bandgap reference diode
designed for high accuracy with outstanding temperature
characteristics at low operating currents. Precision thin-film
resistors result in 0.2% initial voltage accuracy and 50ppm/
°C
maximum temperature drift. The REF1112 is specified from
–40
°C to +85°C, with operation from –40°C to +125°C, and is
offered in a SOT23-3 package.
Typical connections for the REF1112 are shown in Figure 1.
A minimum 1
A bias current is required to maintain a stable
output voltage and can be provided with a resistor con-
nected to the supply voltage. I
BIAS depends on the values
selected for R
BIAS and VS, and will vary as a sum of the
minimum operating current and the load current. To main-
tain stable operation, the value of R
BIAS must be low
enough to maintain the minimum operating current at the
minimum and maximum load and supply voltage levels.
FIGURE 1. Typical Connections.
A 0.1
F load capacitor is recommended to maintain stabil-
ity under varying load conditions. A minimum 0.01
F load
capacitor is required for stable operation. Start-up time for
the REF1112 will be affected, depending on the value of
load capacitance and the bias currents being used. A 1
F
power-supply bypass capacitor is recommended to mini-
mize supply noise within the circuit.
The REF1112 shunt voltage reference provides a versatile
function for low power and space-conservative applications.
The REF1112 can be configured with an additional diode
and NPN transistor to provide a temperature compensated
current reference as shown in Figure 2. The REF112 can be
scaled to provide extremely low power reference voltages.
Figure 3 shows the REF1112 used as a 1V out, 3
A voltage
reference, and in Figure 4 as a 2.5V reference on 1
A.
FIGURE 2. REF1112 Provides a Stable Current Source.
FIGURE 3. MicroPOWER 3
A 1V Voltage Reference.
FIGURE 4. 2.5V Reference on 1
A.
I
BIAS = IREF + ILOAD
V
S
V
REF
R
BIAS
I
LOAD
I
BIAS =
V
S VREF
R
BIAS
0.1
F
I
REF
1
F
V
S
I
SET
0.1
F
R
SET
10k
I
SET =
V
REF
R
SET
0.1
F
3V
V
REF
V
OUT = 1V
795k
250k
1M
REF1112
TLV2401
0.1
F
3V
R
LOAD
V
OUT = 2.5V
0.1
F
R
SET
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相关代理商/技术参数 |
参数描述 |
|---|---|
| REF1112AIDBZRG4 | 功能描述:基准电压& 基准电流 1uA SOT23-3 10ppm/C Shunt RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| REF1112AIDBZT | 功能描述:基准电压& 基准电流 1uA SOT23-3 10ppm/C Shunt RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| REF1112AIDBZTG4 | 功能描述:基准电压& 基准电流 1uA SOT23-3 10ppm/C Shunt RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| REF1117-2.85 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| REF12 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
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